// Simple Set Clipboard System
// Author: Joseph Huckaby

var ZeroClipboard = {

  version: "1.0.7",
  clients: {},
  // registered upload clients on page, indexed by id
  moviePath: 'ZeroClipboard.swf',
  // URL to movie
  nextId: 1,
  // ID of next movie

  $: function (thingy) {
    // simple DOM lookup utility function
    if (typeof(thingy) == 'string') thingy = document.getElementById(thingy);
    if (!thingy.addClass) {
      // extend element with a few useful methods
      thingy.hide = function () {
        this.style.display = 'none';
      };
      thingy.show = function () {
        this.style.display = '';
      };
      thingy.addClass = function (name) {
        this.removeClass(name);
        this.className += ' ' + name;
      };
      thingy.removeClass = function (name) {
        var classes = this.className.split(/\s+/);
        var idx = -1;
        for (var k = 0; k < classes.length; k++) {
          if (classes[k] == name) {
            idx = k;
            k = classes.length;
          }
        }
        if (idx > -1) {
          classes.splice(idx, 1);
          this.className = classes.join(' ');
        }
        return this;
      };
      thingy.hasClass = function (name) {
        return !!this.className.match(new RegExp("\\s*" + name + "\\s*"));
      };
    }
    return thingy;
  },

  setMoviePath: function (path) {
    // set path to ZeroClipboard.swf
    this.moviePath = path;
  },

  dispatch: function (id, eventName, args) {
    // receive event from flash movie, send to client		
    var client = this.clients[id];
    if (client) {
      client.receiveEvent(eventName, args);
    }
  },

  register: function (id, client) {
    // register new client to receive events
    this.clients[id] = client;
  },

  getDOMObjectPosition: function (obj, stopObj) {
    // get absolute coordinates for dom element
    var info = {
      left: 0,
      top: 0,
      width: obj.width ? obj.width : obj.offsetWidth,
      height: obj.height ? obj.height : obj.offsetHeight
    };

    while (obj && (obj != stopObj)) {
      info.left += obj.offsetLeft;
      info.top += obj.offsetTop;
      obj = obj.offsetParent;
    }

    return info;
  },

  Client: function (elem) {
    // constructor for new simple upload client
    this.handlers = {};

    // unique ID
    this.id = ZeroClipboard.nextId++;
    this.movieId = 'ZeroClipboardMovie_' + this.id;

    // register client with singleton to receive flash events
    ZeroClipboard.register(this.id, this);

    // create movie
    if (elem) this.glue(elem);
  }
};

ZeroClipboard.Client.prototype = {

  id: 0,
  // unique ID for us
  ready: false,
  // whether movie is ready to receive events or not
  movie: null,
  // reference to movie object
  clipText: '',
  // text to copy to clipboard
  handCursorEnabled: true,
  // whether to show hand cursor, or default pointer cursor
  cssEffects: true,
  // enable CSS mouse effects on dom container
  handlers: null,
  // user event handlers

  glue: function (elem, appendElem, stylesToAdd) {
    // glue to DOM element
    // elem can be ID or actual DOM element object
    this.domElement = ZeroClipboard.$(elem);

    // float just above object, or zIndex 99 if dom element isn't set
    var zIndex = 99;
    if (this.domElement.style.zIndex) {
      zIndex = parseInt(this.domElement.style.zIndex, 10) + 1;
    }

    if (typeof(appendElem) == 'string') {
      appendElem = ZeroClipboard.$(appendElem);
    } else if (typeof(appendElem) == 'undefined') {
      appendElem = document.getElementsByTagName('body')[0];
    }

    // find X/Y position of domElement
    var box = ZeroClipboard.getDOMObjectPosition(this.domElement, appendElem);

    // create floating DIV above element
    this.div = document.createElement('div');
    var style = this.div.style;
    style.position = 'absolute';
    style.left = '' + box.left + 'px';
    style.top = '' + box.top + 'px';
    style.width = '' + box.width + 'px';
    style.height = '' + box.height + 'px';
    style.zIndex = zIndex;

    if (typeof(stylesToAdd) == 'object') {
      for (addedStyle in stylesToAdd) {
        style[addedStyle] = stylesToAdd[addedStyle];
      }
    }

    // style.backgroundColor = '#f00'; // debug

    appendElem.appendChild(this.div);

    this.div.innerHTML = this.getHTML(box.width, box.height);
  },

  getHTML: function (width, height) {
    // return HTML for movie
    var html = '';
    var flashvars = 'id=' + this.id + '&width=' + width + '&height=' + height;

    if (navigator.userAgent.match(/MSIE/)) {
      // IE gets an OBJECT tag
      var protocol = location.href.match(/^https/i) ? 'https://' : 'http://';
      html += '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="' + protocol + 'download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="' + width + '" height="' + height + '" id="' + this.movieId + '" align="middle"><param name="allowScriptAccess" value="always" /><param name="allowFullScreen" value="false" /><param name="movie" value="' + ZeroClipboard.moviePath + '" /><param name="loop" value="false" /><param name="menu" value="false" /><param name="quality" value="best" /><param name="bgcolor" value="#ffffff" /><param name="flashvars" value="' + flashvars + '"/><param name="wmode" value="transparent"/></object>';
    } else {
      // all other browsers get an EMBED tag
      html += '<embed id="' + this.movieId + '" src="' + ZeroClipboard.moviePath + '" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="' + width + '" height="' + height + '" name="' + this.movieId + '" align="middle" allowScriptAccess="always" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="' + flashvars + '" wmode="transparent" />';
    }
    return html;
  },

  hide: function () {
    // temporarily hide floater offscreen
    if (this.div) {
      this.div.style.left = '-2000px';
    }
  },

  show: function () {
    // show ourselves after a call to hide()
    this.reposition();
  },

  destroy: function () {
    // destroy control and floater
    if (this.domElement && this.div) {
      this.hide();
      this.div.innerHTML = '';

      var body = document.getElementsByTagName('body')[0];
      try {
        body.removeChild(this.div);
      } catch (e) {;
      }

      this.domElement = null;
      this.div = null;
    }
  },

  reposition: function (elem, appendElem) {
    // reposition our floating div, optionally to new container
    // warning: container CANNOT change size, only position
    if (elem) {
      this.domElement = ZeroClipboard.$(elem);
      if (!this.domElement) this.hide();
    }
    if (typeof(appendElem) == 'string') {
      appendElem = ZeroClipboard.$(appendElem);
    } else if (typeof(appendElem) == 'undefined') {
      appendElem = document.getElementsByTagName('body')[0];
    }

    if (this.domElement && this.div) {
      var box = ZeroClipboard.getDOMObjectPosition(this.domElement, appendElem);
      var style = this.div.style;
      style.left = '' + box.left + 'px';
      style.top = '' + box.top + 'px';
    }
  },

  setText: function (newText) {
    // set text to be copied to clipboard
    this.clipText = newText;
    if (this.ready) this.movie.setText(newText);
  },

  addEventListener: function (eventName, func) {
    // add user event listener for event
    // event types: load, queueStart, fileStart, fileComplete, queueComplete, progress, error, cancel
    eventName = eventName.toString().toLowerCase().replace(/^on/, '');
    if (!this.handlers[eventName]) this.handlers[eventName] = [];
    this.handlers[eventName].push(func);
  },

  setHandCursor: function (enabled) {
    // enable hand cursor (true), or default arrow cursor (false)
    this.handCursorEnabled = enabled;
    if (this.ready) this.movie.setHandCursor(enabled);
  },

  setCSSEffects: function (enabled) {
    // enable or disable CSS effects on DOM container
    this.cssEffects = !! enabled;
  },

  receiveEvent: function (eventName, args) {
    // receive event from flash
    eventName = eventName.toString().toLowerCase().replace(/^on/, '');

    // special behavior for certain events
    switch (eventName) {
    case 'load':
      // movie claims it is ready, but in IE this isn't always the case...
      // bug fix: Cannot extend EMBED DOM elements in Firefox, must use traditional function
      this.movie = document.getElementById(this.movieId);
      if (!this.movie) {
        var self = this;
        setTimeout(function () {
          self.receiveEvent('load', null);
        }, 1);
        return;
      }

      // firefox on pc needs a "kick" in order to set these in certain cases
      if (!this.ready && navigator.userAgent.match(/Firefox/) && navigator.userAgent.match(/Windows/)) {
        var self = this;
        setTimeout(function () {
          self.receiveEvent('load', null);
        }, 100);
        this.ready = true;
        return;
      }

      this.ready = true;
      this.movie.setText(this.clipText);
      this.movie.setHandCursor(this.handCursorEnabled);
      break;

    case 'mouseover':
      if (this.domElement && this.cssEffects) {
        this.domElement.addClass('hover');
        if (this.recoverActive) this.domElement.addClass('active');
      }
      break;

    case 'mouseout':
      if (this.domElement && this.cssEffects) {
        this.recoverActive = false;
        if (this.domElement.hasClass('active')) {
          this.domElement.removeClass('active');
          this.recoverActive = true;
        }
        this.domElement.removeClass('hover');
      }
      break;

    case 'mousedown':
      if (this.domElement && this.cssEffects) {
        this.domElement.addClass('active');
      }
      break;

    case 'mouseup':
      if (this.domElement && this.cssEffects) {
        this.domElement.removeClass('active');
        this.recoverActive = false;
      }
      break;
    } // switch eventName

    if (this.handlers[eventName]) {
      for (var idx = 0, len = this.handlers[eventName].length; idx < len; idx++) {
        var func = this.handlers[eventName][idx];

        if (typeof(func) == 'function') {
          // actual function reference
          func(this, args);
        } else if ((typeof(func) == 'object') && (func.length == 2)) {
          // PHP style object + method, i.e. [myObject, 'myMethod']
          func[0][func[1]](this, args);
        } else if (typeof(func) == 'string') {
          // name of function
          window[func](this, args);
        }
      } // foreach event handler defined
    } // user defined handler for event
  }

};